Pulmonary vascular disease & thromboembolismRandomised controlled trial

Ultrasound-Facilitated, Catheter-Directed Fibrinolysis for Acute Pulmonary Embolism

N Engl J MedPublished

  • Randomised controlled trial
  • multinational
  • adaptive design
  • blinded outcome adjudication

Authors' conclusion

In patients with acute, intermediate-risk pulmonary embolism, ultrasound-facilitated, catheter-directed fibrinolysis plus anticoagulation led to a lower risk of the composite of pulmonary embolism-related death, cardiopulmonary decompensation or collapse, or symptomatic recurrence of pulmonary embolism within 7 days than anticoagulation alone.

Study context

Population
Acute intermediate-risk PE (RV/LV end-diastolic diameter ratio ≥1.0, elevated troponin) with ≥2 indicators of cardiorespiratory distressITT population
Participants
544 participants
Comparison
Intervention vs Control
  • Interventionn = 273
  • Controln = 271reference
Primary endpoint
Composite of:
  • PE-related death
  • Cardiorespiratory decompensation or collapse
  • Symptomatic recurrent PE
Follow-up
Within 7 days

Primary result

As reported in the abstract

Relative risk

0.39

95% CI 0.20–0.77

P = 0.005

Events by treatment group

Intervention vs Control
RR 0.39 (95% CI 0.20–0.77); P = 0.005

Safety

Major bleeding · within 7 days after randomization

P = 0.32

Major bleeding · within 30 days

P = 0.64

Other serious adverse events; intracranial hemorrhage · up to 30 days after randomization

No substantial between-group differences in other serious adverse events
No intracranial hemorrhage occurred

Original publication

Ultrasound-Facilitated, Catheter-Directed Fibrinolysis for Acute Pulmonary Embolism. N Engl J Med. Published 28 March 2026. doi:10.1056/nejmoa2516567

Summarised from the published abstract; every number is checked against it